<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 页面未找到</title>
    <style>
        body {
            font-family: 'Arial', sans-serif;
            background-color: #f8f9fa;
            color: #343a40;
            margin: 0;
            padding: 0;
            display: flex;
            justify-content: center;
            align-items: center;
            height: 100vh;
            text-align: center;
        }
        .container {
            max-width: 600px;
            padding: 2rem;
        }
        h1 {
            font-size: 5rem;
            margin: 0;
            color: #6c757d;
        }
        h2 {
            font-size: 2rem;
            margin-top: 0;
            margin-bottom: 1rem;
        }
        p {
            font-size: 1.2rem;
            margin-bottom: 2rem;
            line-height: 1.6;
        }
        .btn {
            display: inline-block;
            padding: 0.8rem 1.5rem;
            background-color: #007bff;
            color: white;
            text-decoration: none;
            border-radius: 4px;
            font-weight: bold;
            transition: background-color 0.3s;
        }
        .btn:hover {
            background-color: #0056b3;
        }
        .error-icon {
            font-size: 6rem;
            margin-bottom: 1rem;
            color: #dc3545;
        }
    </style>
</head>
<body>
    <div class="container">
        <div class="error-icon">⚠️</div>
        <h1>404</h1>
        <h2>页面未找到</h2>
        <p>抱歉，您访问的页面不存在或已被移除。<br>请检查网址是否正确，或返回首页。</p>
        <a href="./index.html" class="btn">返回首页</a>
    </div>
</body>
</html>